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Cornerstone · Grades 3–5 Keystones #1 30 March 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 March 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 3⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 78

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 1:2

    Answer: 7 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 44, 9, 49, 41, 13, 12, 11, 30. Give your answer to 2 decimal places

    Answer: 26.13